It's fine for the most part. Just keyboard shortcuts won't work in default and theming is slightly difficult. You have add extensions to gnome to increase functionality.
Dotdev
Blend is based of arch not Debian.
I said for xbps does not have parallel download support.
Went with Arch and Fedora simply for the parallel downloading. I tried xbps , the only turn off for me was the fact that feature was missing otherwise void is best to stick with.
In panel settings , switch off the automatic size for icons that would fix it for you.
Some which I can think out of my head are : Joplin Trillium Logseq Notion Obsidian Anytype
If you need to draw, I would look into notion and obsidian.
Well you can use the web version.
Void linux with its xbps package manager might match with your requirements.
Then solus with its eopkg package manager which I might wait like next year to try it.
Icon theme : Papirus Theme: Catppuccin Macchiato Cursor: Catppuccin Dark
As you can see I enjoy the catppuccin colorscheme for its variety.
Well there is clipgrab if you want a GUI downloader.
I wouldn't compare void and nix since both of them follow very different approaches. Void is more like a traditional distro while nixos on the other hand uses configurations for setup.
And no you can't use void on nix os as said above. Hannah Montana linux and kubuntu uses Ubuntu as the base that's what he meant.